Patriot EP Series - Flash memory card (microSDXC to SD adapter included) - 256 GB - A1 / Video Class V30 / UHS-I U3 / Class10 - microSDXC UHS-I
Amazon
Patriot 256GB A1 / V30 Micro SD Card for Android Phones and Tablets, 4K Video Recording - PEF256GEP31MCX
Adorama
Patriot Memory Patroit Memory EP Series 256GB Micro SDXC V30 A1 UHS-I U3 4K UHD Card,SD Adapter